BMP7 induces the differentiation of bone marrow-derived mesenchymal cells into chondrocytes

  • Xiaodan Bai
  • Guangze Li
  • Can Zhao
  • Hongzhang Duan
  • Fujun Qu
Original Article

Abstract

Injured articular cartilage has a poor capacity for spontaneous healing. So far, a satisfactory solution to repair the injured cartilage has not been found, but transgenic therapy might be a promising treatment. This study aims to evaluate the potential of transfecting bone morphogenetic protein-7 (BMP-7), a secretory protein, into bone marrow-derived mesenchymal stem cells (BMSCs), in inducing the differentiation of bone marrow stromal cells into chondrocytes in vitro. The phenotypes of the cells were observed by alcian blue staining and H&E staining with an inverted microscope. The glycosaminoglycan (GAG) content of BMSCs transfected with pcDNA3.1-BMP7 or induced by inducing medium was examined after 7, 14, or 21 days of incubation. A standard curve as reference for BMSCs’ GAG content was plotted using galacturonic acid. The content of type II collagen in culture medium was detected by ELISA. Our results demonstrated that BMP7-transfected BMSCs or BMSCs incubated with inducing medium possess the ability to differentiate into chondrocytes. BMP7-induced BMSCs secrete type II collagen and GAG. There was no significant difference between BMP7-induced BMSCs in their secreted protein content when compared with the positive control group (TGF-β1 and dexamethasone) (P > 0.05), but there was significant difference in the secreted protein profile when compared with the negative control group (P < 0.05).

Keywords

Bone morphogenetic protein7 Bone marrow mesenchymal stem cells (BMSCs) Chondrocyte Tissue engineering cartilage 

Notes

Acknowledgments

This work was financially supported by the Natural Science Foundation of Heilongjiang Province, China (Grant No. D2007-70) and the Foundation of Heilongjiang Educational Committee, China (Grant No. 11521170). We thank our colleagues for helpful comments.

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Copyright information

© International Federation for Medical and Biological Engineering 2011

Authors and Affiliations

  • Xiaodan Bai
    • 1
  • Guangze Li
    • 1
  • Can Zhao
    • 1
  • Hongzhang Duan
    • 1
  • Fujun Qu
    • 1
  1. 1.Department of PharmacyThe Second Affiliated Hospital of Harbin Medical UniversityHarbinChina

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